Delete index.md

[v-andreaco]

[opbld31]

Docs Build status updates of commit 95ca975:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs-ref-conceptual/index.md	:white_check_mark:Succeeded	View (azure-node-preview || azure-node-legacy || azure-node-latest)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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[v-andreaco]

@kexugit

This file has been redirected and (I believe) doesn't need to be included in the repo anymore. Is it serving a purpose that I'm not aware of?

[v-emilypr]

Hi @v-alje! Please let me know if you would like any changes to this PR? Thank you!

[v-alje]

I believe this file remains to keep the folder from being deleted.